Transfer vessel between flash tank and purge column

A method for the recovery of a slurry of polymer solids from a polymerization reactor comprising:

• recovering a slurry comprising polymer solids in a liquid medium from a loop reactor through a settling leg via a discharge valve;
• passing the slurry from the loop reactor to a flash vessel;
• reducing a pressure of the slurry from a first pressure to a second pressure within the flash vessel to vaporize the liquid medium and form vapor;
• removing at least a portion of the vapor from the flash vessel to form a concentrated slurry;
• passing the concentrated slurry from the flash vessel to a transfer vessel;
• measuring a level of polymer solids within the flash vessel;
• continuously withdrawing an amount of polymer solids from the transfer vessel and passing the amount of polymer solids from the transfer vessel to a purge vessel, the amount adapted to maintain the level of polymer solids within the flash vessel at a predetermined level;
• removing remaining liquid from the polymer solids within the purge vessel;
• and
• recovering the polymer solids from the purge vessel.